Grizzly Peak Century
- Date Sun 3rd May 2026
- Time 6:30AM PDT
- Location Moraga, California
- Price $60.00 - $100.00
- Races 6 races
- Distances Ultra
Event summary
Get ready for an exhilarating day of cycling at the Grizzly Peak Century, taking place on Sunday, May 3rd, 2026, in the picturesque town of Moraga, Contra Costa. This event offers cyclists a thrilling challenge with a variety of routes to choose from, catering to riders of all skill levels. Participants can tackle four stunning paved routes, ranging from a 30-mile course with approximately 2,000 feet of climbing to the ultimate test of endurance with a 100-mile route boasting an impressive 9,000 feet of elevation gain. For those seeking a rugged adventure, two gravel routes are also available: a 70K option featuring around 3,900 feet of climbing and a demanding 100K route with 6,100 feet of ascent. Join fellow cycling enthusiasts for a day filled with breathtaking scenery and unforgettable camaraderie, all while pushing your limits in the heart of nature!
Organiser's Description
THERE ARE FOUR PAVED ROUTES AND TWO GRAVEL ROUTES TO CHOOSE FROM, ALL OF THEM VERY HILLY:
30 MILES (~2000 FT OF CLIMBING)
50 MILES (~4,400 FT OF CLIMBING)
75 MILES (~6,200 FT OF CLIMBING)
100 MILES (~9,000 FT OF CLIMBING)
70K GRAVEL (~3,900 FT OF CLIMBING)
100K GRAVEL (~6,100 FT OF CLIMBING)
30 MILES (~2000 FT OF CLIMBING)
50 MILES (~4,400 FT OF CLIMBING)
75 MILES (~6,200 FT OF CLIMBING)
100 MILES (~9,000 FT OF CLIMBING)
70K GRAVEL (~3,900 FT OF CLIMBING)
100K GRAVEL (~6,100 FT OF CLIMBING)
Races
-
30 Miles
Sun 3rd May 2026 (9:30AM PDT)
$60.00
OPENS 15 NOVThe 30 mile course has about 2,000 feet of climbing, so it isn't easy! -
50 Miles
Sun 3rd May 2026 (7:30AM PDT)
$90.00
OPENS 15 NOVThe 50 mile course has about 4,400 feet of climbing. It is the heart of the 75 mile course but skips the northern portion. It offers plenty of climbing and great views. From the start at St Mary's College it climbs the east side of the Oakland-Berkeley hills via Pinehurst Road, then follows the ridge up and over Grizzly Peak and into Tilden Park to the rest stop at Island Picnic Area. It then continues on the ridge and around the north end of the Berkeley Hills to Castro Ranch Road. Then it's on to the Three Bears with a rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal. -
75 Miles
Sun 3rd May 2026 (7:30AM PDT)
$95.00
OPENS 15 NOVThe 75 mile (actually about 73 mile) course with about 6,200 feet of climbing is our most popular route. From the start at St Mary's College it climbs the east side of the Oakland-Berkeley hills via Pinehurst Road, then follows the ridge up and over Grizzly Peak and into Tilden Park to the rest stop at Island Picnic Area. It then heads north to the edge of the Bay and the Carquinez Strait to the rest stop at Port Costa. From there it climbs McEwen Road for a run down into Franklin Canyon and Alhambra Valley, then over Pig Farm Hill and through the hills around Briones Reservoir to the rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal. -
100 Miles
Sun 3rd May 2026 (6:30AM PDT)
$100.00
OPENS 15 NOVThe 100 mile course has roughly 9,000 feet of climbing. The route starts with an early morning south loop to the Ivy Park rest stop. Then it climbs the east side of the Oakland-Berkeley hills via Pinehurst Road, and follows the ridge up and over Grizzly Peak and into Tilden Park to the rest stop at Island Picnic Area. It then heads north to the edge of the Bay and the Carquinez Strait to the rest stop at Port Costa. From there it climbs McEwen Road for a run down into Franklin Canyon and Alhambra Valley, then over Pig Farm Hill and through the hills around Briones Reservoir to the rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal. -
70K (Gravel)
Sun 3rd May 2026 (7:30AM PDT)
$90.00
OPENS 15 NOVThe 70K gravel route explores some of the greatest hits in our wonderful East Bay Regional parks. The 70K route is identical to the 100K route without the early morning loop through Lake Chabot Park, so you should have some company on the trails. After a 4 mile paved lead-in, you'll hit the dirt to traverse Redwood Park on Eastridge Trail. Then enjoy the paved Skyline Drive and our namesake Grizzly Peak Blvd enroute to Seaview and other trails in Tilden Park. After the rest stop at Island Picnic Area you'll head down Wildcat Creek and then up and over the ridge to join the road riders for the trip back to St Mary's. The course covers about 41 miles with about 3,800 ft of elevation gain. -
100K (Gravel)
Sun 3rd May 2026 (6:30AM PDT)
$100.00
OPENS 15 NOVThe 100K gravel route explores some of the greatest hits in our wonderful East Bay Regional Parks. You'll start with a morning loop through Anthony Chabot Park before the first rest stop. Then traverse Redwood Park on Eastridge Trail and enjoy the paved Skyline Drive and our namesake Grizzly Peak Blvd enroute to Seaview and other trails in Tilden Park. After the rest stop at Island Picnic Area you'll head down Wildcat Creek and then up and over the ridge to join the road riders for the trip back to St Mary's. The course covers about 61 miles with about 6,000 ft of elevation gain. This route will challenge you while helping sharpen your early season fitness and affording you the beauty of the East Bay.
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Location
St. Mary's College, 1928 St. Marys Rd., Moraga, 94575, CA, United States
Grizzly Peak Century
